This novel is based in part upon the scenario of the photo-drama of the same name written by Walter MacNamara and produced by the UNIVERSAL FILM MANUFACTURING COMPANY, New York City. The incidents and characterisations are founded upon stories of real life. Actual scenes of the underworld haunts are faithfully reproduced. The criminal methods of the traffickers are substantiated by the reports of the John D. Rockefeller, Jr., Investigating Committee for the Suppression of Vice, and District Attorney Whitman's White Slave Report.